The purpose of this research study is to determine how sunitinib (sunitinib malate) causes fatigue. Patients will be asked to complete a brief questionnaire (survey) to rate their levels of fatigue every two weeks while they are participating in this research study. The questionnaire takes approximately 10-15 minutes to complete and is 9 questions. A series of physical measurements for fatigue will be performed before the first dose of sunitinib and again (4) weeks later to see if there are any changes in physical level of fatigues